Wheeled scraper



M y 21, 29 A. P. ARMINGTON ETAL 1, ,1 7

1 t e 8 h S S t 9 9 h s 2 5 2 R9 l M 2 m2 I 0 me D w d h i F INVENTORJ, rm, MINI-RED 'H- JI/EMEMS A. P. ARMINGTON EI'AL 1,714,117

WHEELED SCRAPER May 21, 1 929.

Filed Dec. 22, 1925 g Sheets-Sheet 2 mwszvrom APT/1UP P ARM/N670, hl/NFRED H. Jamar/vs,

memes as 21, 1929.

UNITED s raras ARTHUR r. ARMINGTON, or WILLOUG-HBY, AND wmrann H. aunaenns, or crinva LANE; 0310, ass'renoas 'ro THE nucmn cnann AND EOIST- conserve", or anemia 'VILLAGE, 01110, A CORPORATION or onro.

wnnnnnn scnarnn.

Application filed December 22, 1925. Serial No. 7?,028.

This invention relates to wheeled scrapers intended to be trailed behind a means of motive power such as a gasoline tractor, and more particularly to a so-called rotary type of scraper wherein material to be moved is loaded into the scraper b a scooping motion of the load container or ucket, may then be transported after. returning the bucket to its normal or carrying position, and ejected when desired by a backward tilting of the bucket. i The objects of the invention are the pro duction of a device capable of performing all of these operations as desired, light in weight, simple in design and consequently inexpensive in construction,,and capable of manipulation by the operator of the tractive means without interference with the attention r'equiredby the operation thereof; but especially is it an object to provide means both manually and automatically adjustable, to compensate for variations in the quality and condition of the soil in which the scraper is to be 0 erated. p

The ob ects referred --to are accomplished by a peculiar and novel manner of mounting the bucket in its frame, whereby the motion of the bucket while loading is automatically governed by the soil being loaded, the depth of cut taken by the scraper varying dependent upon the resistance of the soil to the ll of the bucket a ainst the-forward motion o the scraper, the result being that the drawbar requirement of the scraper is automatically maintained within predetermined limits, and an excessive maximum or stalling load upon the tractive means prevented. The arrangement which comprises our invention .will be apparent from the following de--' scription with reference to the accompanying drawings in which: 1

Figs. 1 and 2 show a-plan view and elevation respectively of the scraper in loading position. Figs. 3 and 4 are sectional views along the line 3-14 of Fig. 1, but showing the bucket in dumping and carrying positions respectively. v Fi 5 is a detail of an inclined plane and its a justing means employed. i

Fig. 6 is a sectional detail of the hoisting drum appearing in Figs. 1 to 4, taken upon the line 6 of Fig. 1. 1

Fig. 7 is a sectional detail of the supporting means of.v the rear end of the bucket,

taken along the line 7-7 of Fig. 4. The principal components of the scraper are the frame 1 supported on a pair of wheels 2, carrying a bucket 3 secured to the frame by the movable pivot 4 to be described in detail hereinafter; and the uprights 5 fixed upon the frame. A Supported by the uprights 5 is the shaft 6. which is caused'to rotate as the scraper is advanced, by a chain 7 appearing in Figs. 05 land 2, running over sprockets mounted upon one end of the shaft -6 and the'correspending one of the wheels 2 respectively. Loosely mounted on the shaft 6 is a chain windingdrum 8provided'on each side with friction surfaces to engage corresponding friction surfaces on .the members 9 betweem which the drum is mounted. One of the members '9 issecured'tothe shaft 6; the other one is keyed to rotate with the shaft but is slidable longitudinally upon it to, engage the drum 8 between the two members 9, by means I of a helical-cam which in turn may be rotated by the lever 11 to which is connected the control cablel2, and which is normally spring retainedain the position shown in Fig. 2. Thus when the lever is moved in a clockloose drum 8 is seized between the friction surfaces 9 'and caused to rotate with the shaft 6 so long as the tension on the cable is maintained.

Across the forward end of the bucket and projecting beyond the sides thereof is the rod 20 to the centenof which is secured a bucket' chain the opposite end of which is secured in a deep, narrow groove in the drum 8 ,whereby by winding the bucket chain uponthedrum the forward end of the bucket is raised and the bucket causedto tilt upon its axis-4, the mechanical advantage of the winding drum being "a maximum when the bucket is tilted farthest forward, and, decreasing as theeffective radius of the drumis increased by the. chain being wound upon it as shown in Fig. 6. Y

The forward end of the frame 1 carries the drawbar -13 by means of which the scraper may be attached to the draw bar of the traction means. 9

At each sideof the frame is mounted a. a

bearing inwhich is pivoted one end of a rod medially upon which is mounted the nd lever 14, and at each end a lever 16. Pivotally mounted upon each side of the frame below the projecting ends of the rod 20, s a supporting member 18, connected by -a'l1nk 17 with one of the levers 16. The llllkS 17 are bent-as shown in Fig. 1, to clear the ends path of swing of the rollers upon the ro- 1nclined planes or ramps 22. These inclined of the upright frame members 5. .Adjust-' of the rod 20, upon which are mounted rollers; and the members 18 extend somewhat rearward for a purpose to be described. The lever 14 and connecting linkage just g le scribed is normally maintained by gravity assistedby the spring 19 in the position shown in the figpres, the upper ends of the supporting mem rs 18 lying neath the projecting ends of the rod 20-and thus preventing the bucket 3. from dropping below the carrying position shown in Flg. 4.

To each "side of the frame of the scraper.

but spaced somewhat therefrom, and in the ecting ends of the rod 20; are'secure planes serve to limit the downward travel of .the forward end of the bucket, and the elfective limit downwards is by reason of the incline dependent upon'the longitudfiial position of the b upket in the frame. 1

The bucket is pivoted at its rear upon a rod 4 extending across and somewhat beyond the sides of the bucket and supported at its ends in turn in the upper ends oPlink members 21, these links being ivotally secured at their lower ends to the ottom ends ably positioned midway upon each of the uprightsis a spring 23 connected at its lower end to a projection upon the upper portion of the corresponding link 21, wherebythe rear end of the bucket is resiliently urged upwards. The uprights 5 are formed of angle iron sothat upward motion offthe links 21 is limited to the position shown in Figs. 3 and'4, and by means of a projecting finger at the bottom of each link, downward motion is Fi .2.

fiperation' of the scraper is as 'follows: To load the bucket the lever 14 is raised, which shifts the position of the supporting members 18 and trips the forward end of the bucket, which drops downward, the rollers upon the projecting ends of the rod 20 now resting just above the inclined planes 22 instead of upon the supporting members 18,

' and the lip'of the bucket resting-upon the ground. As the scraper is advanced the 11p digs-into the earth as shown in Fig. 2,

which upon continued advance-of the scrap-, er is forced back into' the bucket..

As the resistance of the earth to the entry' therein of the lip of the bucket, and hence to the advancement of the scraper, ap-

proaches a predetermined limit dependent limited to-the position shown in upon the angle of the inclinedfplanes 22 and thertension of the springs 23, the bucket is caused to make a scooping motion, the rear endof the bucket moving with respect tothe frame backward and consequently downward upon an are about the pivoted ends of the links 21, and the forwardend of the bucket moving with respect to the frame backward and consequently upward, the

rollers upon the rod 20'riding up the inclined planes 22. This compound scooping motion of the bucket with respect to' the frame is opposed by the springs 23,'and may v be adjustably "controlled bysuitably locating the upper ends of the springs in the uprights 5, and adjusting the angle of the inchned planes 2 'Tere'it not for our provision of the means r for accomplishing the bucket motion just described, the tendency of the lip of the bucket when lowered to the ground, would be to immediatelydig into the arth-at such a rapidly increasing angle th rewith as to soon stall the scraper in earth of any very considerable firmness; further under su h conditions it would. be impossible to raise the bucket by power in the manner to be described. We have found" that in practice the action of our bucket adjusts itselfautomatically to the conditions of soil encount-L ered by the scraper and that thus with the employment of our device stalling of the scraper is almostentirely 'o'bviated, the bucket automatically tending to-right itself upon meeting excessive obstruction by the .soil, whether due to adverse quality or condition of the soil, or when the bucket has acquired a sufficient load thereof.- In other words, as the'scraper is advanced to load the bucket, the forward end of the bucket is by the arrangement described, automati- .cally maintained at the proper elevation, dc

ber 18 the spring 19 returns the linkage to the position of Figs. 1 to 4, and members 18 are thus brought into position to again sup port the bucket; therefore as soon as the bucket rises as far as the position shown in Fig. 4 thetension on the cable 12 may be released and the/bucket will remain level. It

will be noted that the angular relation of the parts issuch that in the rearward or loaded position of the bucket in the frame, (the position of Fig. 2) the bucket chain-has a greater mechanical advantage to elevate the] bucket, than were the pivot 4 fixed upon the frame in the position of Fig,

The load may thus be transported wher ever desired.

When it is desired to dump the load, the operating cable. 12 is again pulled, thus further raising the bucket by means of the winding drum 8- to the position shown in Fig. 3 or sufiiciently to.slide the material back out of the bucket.

' Upon release of the cable, the empty bucket returns by gravityto the position in Fig.

4 where it remains'until the scraper arrives at the loading point.

It is to be noted that manipulation of only two controls-the lever 14.- and cable 12-.is required in the entire operation of our scraper. These controls are so located as to be within easy reach of the operator of the tractor-pulling the scraper, the yoke 13 being so proportioned that when attached to the drawbar of any standard tractor, the lever 14 is brought closely behind the operators seat.

It is also to be noted'that since all of. the

operations of the bucket may be performed while the scraper is in locomotion, the functioning of the scraper may be accomplished" shown; the springs 23 are adjustably po-- sitioned at their upper'ends upon the uprights 5; the spring 19 is adjustably posi tioned upon the yoke 13; the inclined planes 22 are adjustable angularly upon the frame 1 by means of extra bolt holes therein; ten-. sion upon the chain 7 is adjustable by an idler-pulleyas shown in Fig. 2.

WVhile we have illustrated and described but a single example of-scraper embodying our invention, we do not wish to be limited more closely thereby than the scope of the spirit thereof. For example another type of frictionolutch could be substituted for the one shown; the? operating lever might be shifted along the rod 15 to adapt the scraper to! a particular tractor, or 'a pilot wheel or pair of wheels might be arranged to support the .yoke 13 to adapt the scraper to be drawn by horses,

VVha-t we claim therefore is: r

1. Ina scraper, a wheeled frame, a bucket mountedfor movement therein, the rear end of said bucket being pivotally supported by links in pivotal connection with said frame, means upon said frame operative --to .urge

said links to upstanding position, ramps se- A cured upon saidframe and adapted to engage members upon the forward end of said bucket to support the same, said links and said ramps being adapted for co-o' oration whereby generally rearward motion of said bucket in said frame during advance of said scraper effects a scooping motion of said bucket.

2. In a scraper, a wheeled frame, a bucket mounted for movement therein, said mounting comprising an oscillatory support adapted to allow arcuate bodily downward move-.

ment of the rear end of said bucket and pivotal upward movement of'said bucket about said rear end as said bucket is loaded, and means associated with sa1d oscillatory support tending to maintain the rear end of said bucket in raised position,

3. Ina scraper, a wheeled frame, a bucket mounted for movement therein, the rear end of saidbucket being pivotally supported by links in pivotal connection with said frame,

means upon said frame operative to urge saidlinks to upstanding position, ramps secured upon said frame and adapted to engage members upon theforward end of said bucket to support the same, said links and said ramps being adapted for c'o-operation wherebyresistance of said bucket to advance of said scraper effects downward and rearward motion of the 'rear end of said bucket and upward'and rearward motion of the forward end of said bucket with respect to said'frame.

4. In a scraper, a wheeled frame, a bucket .ed-toallow arcuate bodily movement of the rear end of said bucket and pivotal movement of said bucket about said rear end, means associated with said oscillatory support tending to raise'the rear end of said bucket in said support, members upon said frame adapted to engage projectingv members upon the forward end of said bucket to support the same and allow upward and rearward movement thereof whereby generally rearward motion of said bucket-insaid frame during advance of said scraper effects a scooping motion of said bucket.

' 5. In a scraper, a wheeled frame, a bucket mountedfor movementtherein, the rear end mounted for movement thereon, saidmount 1 ing comprising an oscillatory support adaptof said bucket being pivotally supported by links in'pivotal connection with said frame,

means upon said frame operative to urge said lll'lkSiO upstandlng position, ramps secured upon saidframe and adapted to engage members upon the forward end of said bucket to support. the same, said links and said ramps being-adapted for co-operation whereby resistance of said bucket to ad, vance of said scraper effects upward and rearward motion of the forward end of said bucket and downward and rearward motion of the rear end of said bucket with respcct to said frame, said motion being in proportion to said resistance.

(ii-In ascraper, a wheeled frame, a bucket mo'unted for movement therein, the rear endof said bucket being pivotally supported by links in pivotal connection with said frame,

meansiupon said frame operative to urge said links to upstanding position, ramps scrure'd upon said frame and adapted to e1r-- gage members upon the forward end of said bucketto support the same, said links and said ramps being adapted for'co-operation whereby resistance of said bucket to advance of said scraper effects a scooping motion of said bucket, said motion being in propor tion to said resistance, and manually controlled means for elevating the forward end of said bucket.-

7. In a scraper, a wheeled frame, a bucket mounted for movement therein, the rear end of said bucket being pivotally supported by links in pivotal connection with said frame,

means upon said frame operative to urge said links to upstanding position, ramps secured upon said frame and adapted to engage members upon the forward end of said bucket to support the same, said links and said ramps being adapted for co-operation whereby resistance of said bucket to advance of said scraper effects upward and rearward motion of the forward end of said bucket and. downward and rearward motion of the rear end of said bucket with respect to said frame, said mot-ion being in: proportion to said resistance, and manually controlled means actuable by the wheels of sald scraper as the same advances for elevating the forward end of said bucket.

8. In a scraper, a wheeled frame, a bucket mounted for movement therein, the rear end of said bucket beingpivotally supported by bucket, and displaceable members tojsupport the fprward end of said bucket fof said bucket beingzpivotallysupported by links in pivotal connection with said frame,

means upon said frame operative to urge said links t6 upstanding position, ramps secured'upon said frame and adapted to engage members upon the forward end of said bucket to support the same. said links and said ramps being adapted for co operation whereby generally rearward motion of said bucket in'said vframe during advanceofcsaid scraper effects a scooping motion of Said adapted clear of said ramps; 9.- In a scraper, a wheeled frame, a bucket mounted for movement therein, the rear end 1 links inpivotal connection with said frame,

Vmcans; upon said frame operative to urge said links to upstandmgpositlon, ramps se= cured upon said frame and adapted to engagemembersupon the forward end of said bucket to support the same, said links and said ramps being adapted for co-operatiou whereby generally rearward motion of said bucket in said frame during advance of said scraper effects a scooping'motion of said bucket, and manually displaccable members adapted to support the forward end of said bucket clear of said ramps.

10. In a scraper, a wheeled frame, a. bucket 'mounted for movement therein, the rear end of said bucket being pivotally supported by links in pivot-a1 connection with said frame,

means upon said frame operative to-urge said links to upstanding position, ramps secured upon said frame and adapted to engage members upon the forward end of said bucket to support the same, said linksrand said ramps being adapted for co-operation whereby generally rearward motion of said bucket in said frame during advance of said scraper effects a scooping motion of said bucket, "displaceable members adapted to support the forward end of said bucket clear of said ramps and meansto urge said members to bucket supporting position. 11. In' a scraper, a wheeled frame, a bucket moimted for movement therein, the rear end 0 i of said bucket being pivotally supported by links in pivotal connection with said frame, means upon said frame operative to urge said links to upstanding position, ramps so? cured upon said frame gage members upon the forward end of said bucket to support the same, said links ands.

said ramps being adapted for co-operation whereby generally rearward motion of said bucket in said frame during advance of said scraper effects a scooping motion of said bucket and displaceable members adapted to support the forward end of said bucket clear ofsaid ramps, saidelevating means being adapted to raise the forward end of said W5 bucket to a supported position upon said dlsplaceable members, and operable to further raise said forward end to dump the contents of said bucket rearwardlv.

12. In a scraper, a wheeled frame, a

bucket having rearward connection t-heremeans on said frame for supporting the forward end of said bucket 1n loading position .with for relative lon itudinal movement,

and adapted to elevate said forward end'de- I otion, means for yieldably 16 130 and adapted to en- 95 dumping carrying ing said motion, releasable latch means for supporting said bucket end in carrying position, and releasable means for elevating said bucket end whereby the bucket may be adjusted selectively to said positions.

14. In a scraper, a wheeled frame, a bucket having rearward connection therewith for relative longitudinal movement,

said connection being adapted to lower the rear end of said bucket dependent on said longitudinal movement, means on said frame for supporting the forward end of said bucket in loading position and adapted to elevate said forward end dependent upon said longitudinal movement, whereby the depth of out may be adjusted, and means for yieldably opposing said movement.

15. In a machine, of the class described, a rigid frame, a scraper bucket in sup orted association therewith for movement t ereon between digging and load-carrying and dumping positions, means for controlling said bucket movement to adjust the bucket to and from said positions, said frame ineluding fixed axle means,.wheels associated with said axle means to support said frame,-

and cooperative parts on said-frame and on said bucket arranged to be associated when said bucket is in diggin position, for automatically controlling t e elevation of the bucket lip dependent upon resistance of the I ment of said bucket in said frame when in digging position, and including means-for imparting to the lip portion of said bucket a vertical component of said longitudinal movement, whereby rearward bucket movement relative to said frame'is accompanied by'raising of the bucket lip, and means for yieldably opposing said rearward movement.

' Signed by us, this 15th day of December,

ARTHUR P. ARMINGTON. WINFRED H. JUERGENS. 

